擅长:python、mysql、java
<p>您可以使用python的<a href="https://docs.python.org/3/reference/expressions.html#membership-test-operations" rel="nofollow noreferrer">membership identities</a>来检测项目是否在列表中。你知道吗</p>
<pre><code>if post.mag_no in [post.cn1,post.cn2,post.cn3,post.cn4]:
form.save()
return redirect('someview')
else:
return HttpResponse('Dind't exist or match to this magazine no')
return render(request,'cnCreate.html',{'form':form})
</code></pre>